Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca831c57eb50417…

MALICIOUS

PDF

70.6 KB Created: 2021-02-21 23:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a74746f1e4df8b6b97007e9d0617b49 SHA-1: 5df7816dd604b50b9662339014b504b3bd1b19ad SHA-256: 6ca831c57eb5041703de78ac28816a9fecae1f1d7c0531a3c6e5c52e50f34784
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/123?utm_term=tcp%252Fip+stack+vmotion PDF link annotation
    • https://kuwiliwal.weebly.com/uploads/1/3/1/3/131378779/bibexovisum_lewuruki_tanodanajeb.pdfIn PDF document text
    • https://wiwamimojuwat.weebly.com/uploads/1/3/0/8/130813692/9120317.pdfIn PDF document text
    • https://lolifibek.weebly.com/uploads/1/3/4/6/134634661/rowarusixewuxi_goxot.pdfIn PDF document text
    • https://nimivumunekal.weebly.com/uploads/1/3/3/9/133999229/vugufuwezisa.pdfIn PDF document text
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/a2c2491845.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/lagesejevad_gugejopevuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420028/normal_6027caf4443a0.pdfIn PDF document text
    • https://javufivupa.weebly.com/uploads/1/3/4/3/134349262/favogesizadabur.pdfIn PDF document text
    • https://dowusasetitemej.weebly.com/uploads/1/3/4/3/134307927/6650303.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/voropa/who_makes_the_mercruiser_4.3_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/lexis_audio_editor_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/bein_sport_guide_uae.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/planner_template_for_notability.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/orientdb_vs_arangodb_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/electric_guitar_lessons_free_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD924 5060 bytes
SHA-256: 5c6ed5e7a3f65a00bfb4d813d327713e214871cd0e064ba09ee8fd796cc0366c
font_01_sfnt_off0000ea64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 10216 bytes
SHA-256: 542789c9d207a4a9f1fd2dc3e536313fb6f58491d56a81af1598cc91b4c2adc7

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